I have several video recordings of the major left leaning news networks running audio ads over bernie speaking while joe and pete were allowed to speak freely,

I have several video recordings of the major left leaning news networks running audio ads over bernie speaking while joe and pete were allowed to speak freely, at length even. How is this possible that in 2020 an election can be so obviously rigged by keeping the candidates from speaking to their supporters via news coverage? Even news anchors that spoke of bernie were silenced for the rest of the broadcast. Confirmation bias likely, but I'm still shocked.